Grout Cleaner Professional Heavy Duty Tile & Grout Cleaner - Groutrageous Step #1 (Gallon) Professional Grout Cleaner is great for ceramic tile, porcelain tile, & any acid-resistant tile. Groutrageous grout cleaner is proven to completely remove all your grout stains. Groutrageous Grout Cleaner Customer Satisfaction: Do-It-Yourself & clean grout like a professional Why call a grout cleaning company when you can buy the exact industrial-strength formula they use! Groutrageous IS What Commercial Grout Cleaning Companies Use! Clean all of your tile and grout! Apply (spray) full-strength solution to grout lines and let stand 2 to 5 minutes. Agitate with a natural-bristle grout scrub brush. When finished, use a sponge or towel to clean up any leftover residue.